Abstract
A lime stabilized sludge (LSS) from a dairy wastewater treatment plant was evaluated in field studies on a silt loam soil as a source of lime and P for a tall fescue (Festuca arundinacea Shreb.) meadow. An initial treatment of almost 9000 gal/acre significantly increased hay yields and raised the surface soil (0–3 in.) above the pH and Bray and Kurtz no. 1 P sufficiency levels for tall fescue. Supplemental N and K were required to achieve maximum yields of the fescue treated with the lime stabilized biomass. There was sufficient reserve lime in the LSS to offset the acidifying effects of 4 yr of NH4NO3 topdressing.
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